| Abstract:Lignocellulosic gel materials have good biocompatibility and degradability besides the advantages of traditional gels, which have attracted wide attention in the fields of adsorption, energy storage, sensing, catalysis, biomedicine and thermal insulation. In this paper, the preparation methods of lignocellulosic gels were summarized, including physical crosslinking and chemical crosslinking. Among them, the physical crosslinking includes dissolution method and dispersion method. The dissolution method is mainly to use conventional organic solvents, ionic liquids or lithium bromide to dissolve lignocellulosic raw materials followed by regenerating in polar solvents to form gels. The dispersion method is mainly to form gels by "bridging" micro/nano lignocellulosic fibers with the addition of nanocellulose fibers. Chemical crosslinking method refers to the addition of crosslinking agents in the lignocellulosic solutions or suspensions to make the molecular chains in the lignocellulosic fibers form network structures by irreversible covalent bonds. Finally, the existing problems in the preparation of full-component lignocellulosic gels were proposed. |